payment doesn't exist yet
Everything open, payment comes later.
Who it fits
A business that already sells and whose customers come back on their own: a network of shops, a service with regulars. The app has to be adopted first, monetised later.
What it gives
The most people get in and use it. You see who comes back before asking for anything — so you know who to ask.
The counter-effect
The app becomes a free service in people's minds. The day you introduce payment, you negotiate it with users trained to pay nothing.